1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809f5e9980d3b6baa18e49500f3302c8d1720df12b9e8f68bb23bd07f9b2c903. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/64f23800-3130-40b3-a739-88211d15e1b7.json and https://artists.proofprofile.net/proofs/artist/64f23800-3130-40b3-a739-88211d15e1b7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4711716ee0e0a6d453cd9e548853e62d8426c37decca12b05b1647e12a83b071. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFO2105531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03d1aea36924c7aeefe23cfd4318f34537261537320867bf03035b30bbb944b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6Q2101575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2919a36feaf24fd044d905bb8d5ea1507c74759de283acfabf1e9f78c3c6fc6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6Q2101576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a98aa1addafa6ad2bd2cabf755c31d69bff70e5eba90d5d91ecdfde61e0b04. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN32060621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d797b447a46969ba1e3d6e06b8f55ef219cafb5820a5106357370bfce2957b4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN32060622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a778212d9abd2b5e7ef46f08da3e45f7cecc1203eb1496dbc7769aa971540b. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN32060623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2367145b66683e8f12f8775b39889a7801197e191b1d51444e0bccc446e1a2e. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN32060625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b43ad68ab014d1d714f43aeb189c98019df640f366a2ca54a383f3b5b6161b. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN32060627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa6f153c7c1b4d02a76b6c4ea3e756eb8124ee52bf3365c7f9d5b83693e750d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN32060629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb433b36a2ec4009ae2815becb5653f8ae2b9ab92c18eefb6dd9933825710b093. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN32060630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134b76e7d003d9efd166c25f0ee31050ec18c12e8eb30234e616b2a6e6f3f519. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN32060631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5762cc2b0e35ebd0ae7306881fc2b988db2eb4fe525aee8e25b4941f07afc88. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN32060632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c8adc48d48b4d5c17a594c7f399f3b5c3fdc700358b5a391d9787a86c00556. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES82030745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37b4dd9192f61cae3139ee8ea6bf70795cfffba437c21fbf8055f2a6bebb99d. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES82030746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cd91a9e432df2d4ccb33014a91fbc319f67978a5d9be335d391f4b6f3743a8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES82030747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf5b3922da05ebc7507bfc734dedb763c4ca71db3978dfd6886fc8ee089d04f. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES82030748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792fb025c065eb544bda317d8f1d3ad67cb5abf619b5f8ec596add661909fbc1. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES82030749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76920fe83967f18295baa05fa613e244210c6c81cf3f86ff8f988b856913c0c0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES82030750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdc4b96c42d62779515a3efdfbf48e8478eedc6e809048750aa62dc9885926e. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES82030751.